Discrete Dipole Approximation Analysis of Plasmonic Core/Alloy Nanoparticles | Zendy

Wu Wenjie | Zendy; Maye Mathew M. | Zendy

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Discrete Dipole Approximation Analysis of Plasmonic Core/Alloy Nanoparticles

Author(s) -

Wu Wenjie,

Maye Mathew M.

Publication year - 2014

Publication title -

chemphyschem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.016

H-Index - 140

eISSN - 1439-7641

pISSN - 1439-4235

DOI - 10.1002/cphc.201402082

Subject(s) - discrete dipole approximation , alloy , nanoparticle , surface plasmon resonance , plasmon , materials science , dipole , radius , core (optical fiber) , microstructure , shell (structure) , molecular physics , analytical chemistry (journal) , nanotechnology , optoelectronics , chemistry , composite material , chromatography , computer security , organic chemistry , computer science

The surface plasmon resonance (SPR) properties of Au/Au x Ag 1− x core/alloy nanoparticles (NPs) have been investigated by means of the discrete dipole approximation. The core/alloy microstructure was varied by changing the shell alloy composition x , its thickness t S , and the shell thickness to core radius ratio ( t S / r C ) in the range of 0.05–1.0. These changes resulted in a novel tuning of SPR shape, frequency, and extinction. These models were compared with experimental results for Au/Au x Ag 1− x NPs prepared by a microwave‐mediated hydrothermal processing method, which produces core/alloy NPs with SPR signatures closely resembling those of the models.

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